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प्रश्न
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उत्तर
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संबंधित प्रश्न
Fill in the following blank with suitable words:
Magnetic field lines leave the .......... pole of a bar magnet and enter at its .......... pole.
Draw a diagram to show the magnetic field lines around a bar magnet.
An electron beam enters a magnetic field at right angles to it as shown in the Figure.
The direction of force acting on the electron beam will be:
to the left
to the right
into the page
out of the page
A magnetic field exerts no force on:
an electrical charge moving perpendicular to its direction
an unmagnetised iron bar
a stationary electric charge
a magnet
Select the correct option:
A bar magnet is rubbed on a bar of steel along its length 20 times. The bar of steel gets magnetised due to the process of:
How do you account for the following fact?
Soft iron keepers help to prevent the magnets from losing their magnetic properties.
State briefly the molecular theory of magnetism.
Complete the following diagram of magnets to show the lines of force.
A student fixes a white sheet of paper on a drawing board. He places a bar magnet in the centre and sprinkles some iron filings uniformly around the bar magnet. Then he taps gently and observes that iron filings arrange themselves in a certain pattern.
- Why do iron filings arrange themselves in a particular pattern?
- Which physical quantity is indicated by the pattern of field lines around the bar magnet?
- State any two properties of magnetic field lines.
